Door check or closer



(Hommel.) Y l E. I. BLOUNT.

DOOR CHECK 0R CLOSER. l No. 527,584. Patented Oct. 16, 1894.

FE. l.

\/.Tpaas |:s INVEN TDR;

' 'UNTTED STATES PATENT f OFFICE.. i

EUGENE yI., ELoUNT, oE oAEDNEa MASSACHUSETTS, AssIeNoR To THE ELCUNTMANUFACTURING COMPANY, CE PORTLAND, MAINE.

Doon CHECK-0R CLOSER.

SPECIFICATION forming part of Letters Patent No. 527,584, dated October16, 1894.

Application filed December 27, 1893. SerialNo. 494,867. (No model.)

To all whom it may concern:

Be it known that I, EUGENE I. BLOUNT, of Gardncr,in the countyofWorcester,and State of Massachusetts, have invented certain new anduseful Improvements in `Door Checks or Closers, of which the followingis a specification. 1 f

This invention has relation generally to door checks and closers andparticularly` to the means whereby the flow of the liquid from the frontto the rear of the piston is controlled.

It is the purpose of the linvention to sim-4 plit'y the constructionofthe means aforesaid by doing away with one of the passagewaysconnecting the ends of that portion of the cylinder or liquid chamberwithin which the cylinder reciprocates, and making one passage-way servefor the free operation of the piston and other parts inthe opening ofthe door and checking or retarding the same in the closing of the door.

To these ends the invention consists in a door check and closercomprising in its construction a single passage-way connecting the endsof that portion of the cylinder in which the valveless piston operates,said passage-way being provided with a valve which is adapted .tobeopened automatically when the door is opened to permit of the free andpractically unobstructed iiow of the liquid from the rear to the frontof the piston, and to be closed to restrict the flow of the liquid backthrough the said passage-way when the door is closing, all as I willnowv proceed to f describe in detail and Subsequently point out in theclaims. y Reference is to be had to the annexed draw-l ings, and to theletters marked thereon, forining a part of this specification, the sameletters designating thesame parts or features,

, as the case may be, wherever they occur.

Of the drawings-Figure 1 is a front view, (the liquid chamber orcylinder being represented in longitudinal vertical section,) of a doorcheck and closer embodying my invention. Fig. 2 is a horizontal centralsectional View through the liquid chamber or cylinder, the section beingtaken on the line 2-2 of Fig. 3. Fig. 3 is aside elevation of the partswithin the liquid chamber or cylinder, the

v'casing being represented as in section. Fig.

4 isa longitudinal central Sectional view on an enlarged scale of thetube herein shown as forming the passage-way, together with the u valvesandI means. for vregulating the same. Fig. 5 yis a sectional view takenon the line 5 5 of Fig. 4,' looking from -the valve seat toward thevalves, showing both of the latter and the'passage-ways for the flow ofthe fluid. Fig. 6 is a sectional view taken on the line 6-6 of Fig. 4.,showing the valve for controlling the free flow of the liquid back, fromitsv seat and the ports for the free escape of the liquid from thepassage-way. Fig. 7 is a perspective view of both valves as theyappearwhen seated.` Fig. 8 is a perspective view of both valves, that forcontrolling the free ow of the liquid being shown as raised or backAfrom its seat.

Of the drawings-a designateskthe casing of the spring chamber and b thecasing of the liquid chamber or cylinder.

cis the piston adapted to be reciprocated in theforward part of theliquid cylinder by means of the spindle d adapted to be actuated as thedoor is open ed andclosed, and the crank and pitman connection betweenthe said spindle and piston. Any other suitable means for reciprocatingthe piston may however bel provided, as my improvements are notdependent upon any special form'of the -means thus far enumerated.

Instead of providing valve-controlled ports Ain the piston as hasheretofore'been done and constructing a restricted passage-.Wayconnecting the ends of the portion of the liquid cylinder within whichthe piston operates, I provide a single passage-way e, herein shown as atube supported in one end of the. liquid cylinder and extending througha hole or- IOC of the screw valve and adapted to be slid to and frothereon, so that it may be seated upon the valve seat g as shown in Fig.2, or be moved back from said valve seat as shown in Figs. l and 4.

The construction and arrangements of parts are such that when the dooris being opened the valve t' will be moved back from its seat g, and theliquid will tlow unrestricted through the passage-way e around thetinted end of the screw valve h, and out through the ports f in front ofthe piston,but when the door is being closed the valve t' will be forcedto its seat g, and the liquid will flow throughthe restrictedpassage-way afforded by the grooves j formed in the uted end of thescrew valve. For it will be understood that while the valve z' isclosely seated there will still be a restricted opening for the liow ofthe liquid in front of the piston to the rear of the same, by reason ofthe grooves j formed in the tinted ends of the screw valve as isindicated by tho arrows in Fig. 7. The screw valve may be turned in sothat the fiuted end shall extend inward beyond the valve seat g, thusstill further restricting the openings j forming a passage-way from int'ront to the rear of the cylinder. passage-way I am enabled to providemeans for the practically free and unrestricted dow of the liquid fromthe rear to the front of the piston when the door is being opened, andfor the retardation or restricted iiow of the liquid back from the frontto the rear of the piston when the door is closing, so as to check thesame and prevent its slamming.

I do not confine myself to any particular form or location of thepassage-way e, as this may be constructed and arranged to suitcircumstances.

The arrows in the drawings show the course of the liquid in the liquidchamber as the pistonassumes its various positions; and it will be notedthat as the door" is opened the liquid will be drawn or sucked to thefront of the piston thus relieving the force of the liquid on thepacking between the liquid and spring chambers and avoiding liability ofleakages through this source. v

Having thus explained the nature of the invention and described a way ofconstructing and using the same, though without attempting to set forthall of the forms in which it may Thus it will be seen that by a singlebe made or all of the modes of its use, it is declared that what isclaimed is 1. A door check and closer comprising a liquid cylinder, apiston therein, a tube or passage-way afxed to the cylinder andcommunicating between the front and rear of the piston, said tube havingan internal valveseat, and a valve movable in the tube toward and fromsaid seat and adapted to be separated from the seat and permit anunobstructed outward flow of liquid through the tube when the door isopening and to be closed on said seat to restrict the inward iiow of theliquid when the door is closing.

2. A door check and closer comprising a liquid cylinder, a pistontherein, a tube or passage-way aixed to the cylinder and communicatingbetween the front and rear of the piston, said tube having an internalvalveseat, a stem or guide in said tube, and an annular valve adapted toslide on said stem to- Ward` and from the valve-seat, said valve beingadapted to be separated from the seat and permit an unobstructed outwardow of liquid through the tube when the door is opening and to be closedon said seat and at the same time co-operate with the stem inrestricting the inward flow of the liquid when the door is closing.

3. A door check and closer comprising a liquid cylinder, a pistontherein, a tube or passage-way aiiixed to the cylinder and communicatingbetween the front and rear ofthe piston, said tube having an internalvalveseat, an adjustable stem or guide in said tube, an annular valvemovable on the stem and adapted to be separated from the seat and permitan unobstructed outward iiow of liquid through the tube when the door isopening and to co-operate with said stem in restricting the inward iowof liquid throughy said tube when the door is closing, and means foradjusting said rod or stem to vary the restriction of the inward tlow.

In testimony whereof I have signed my name to this specification, in thepresence of two subscribing witnesses, this 13th day of December, A. D.1893.

EUGENE `I. ELoUN'r.

Witnesses:

ARTHUR W. CEossLEY, A. D. HARRISON.

IOO

